Interdigitated array electrode as an alternative to the rotated ring-disk electrode for determination of the reaction products of dioxygen reduction

被引:37
作者
Postlethwaite, TA
Hutchison, JE
Murray, R
Fosset, B
Amatore, C
机构
[1] UNIV N CAROLINA, KENAN LABS CHEM, CHAPEL HILL, NC 27599 USA
[2] ECOLE NORMALE SUPER, DEPT CHIM, URA CNRS 1679, F-75231 PARIS 05, FRANCE
关键词
D O I
10.1021/ac960327b
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Electrochemical reduction of dioxygen in aqueous media can proceed to water, hydrogen peroxide, or a mixture of the two, The production of hydrogen peroxide, classically established with the rotated ring-disk electrode, can also be quantitatively assessed at interdigitated array (IDA) electrodes, where dioxygen is reduced at the set of microband generator electrodes and any H2O2 produced is detected by its oxidation (back to 02) at the interdigitated set of microband collector electrodes, The sensitivity of the IDA for H2O2 detection is higher owing to its more complete collection, and to the ensuing regeneration of O-2, which leads to an amplification of the generator currents, The production of H2O2 is thus reflected both in the ratio of collector and generator electrode currents [the collection efficiency, coll(tau)] and in the ratio of the generator current with the collector potential on to that with it off [amplification factor, ampl(tau)]. The necessary theory for interpretation of the fraction epsilon of H2O2 produced per dioxygen reduced is presented, based on conformal mapping techniques. Explicit equations are derived for epsilon at long times that are independent of the IDA dimensions and that can be used with any two-product electrochemical reaction analogous to the dioxygen reduction. Experimental data are presented for dioxygen reduction in acidic and basic media to illustrate application of the theory.
引用
收藏
页码:2951 / 2958
页数:8
相关论文
共 38 条
  • [1] OXYGEN REDUCTION OF ELECTRODE SURFACES MODIFIED BY FOREIGN METAL ADATOMS
    ADZIC, R
    TRIPKOVIC, A
    ATANASOSKI, R
    [J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1978, 94 (03): : 231 - 235
  • [2] OXYGEN REDUCTION ON ELECTRODE SURFACES MODIFIED BY FOREIGN METAL AD-ATOMS - LEAD AD-ATOMS ON GOLD
    ADZIC, RR
    TRIPKOVIC, AV
    MARKOVIC, NM
    [J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1980, 114 (01) : 37 - 51
  • [3] ADZIC RR, 1975, Z PHYS CHEM NEUE FOL, V98, P95
  • [4] ELECTROCATALYSIS OF OXYGEN ON SINGLE-CRYSTAL GOLD ELECTRODES
    ADZIC, RR
    STRBAC, S
    ANASTASIJEVIC, N
    [J]. MATERIALS CHEMISTRY AND PHYSICS, 1989, 22 (3-4) : 349 - 375
  • [5] ADZIC RR, 1980, GLAS HEM DRUS BEOGRA, V45, P399
  • [6] ALBERY WJ, 1971, RING FISK ELECTRODES
  • [7] CHARGE-TRANSFER AT PARTIALLY BLOCKED SURFACES - A MODEL FOR THE CASE OF MICROSCOPIC ACTIVE AND INACTIVE SITES
    AMATORE, C
    SAVEANT, JM
    TESSIER, D
    [J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1983, 147 (1-2) : 39 - 51
  • [8] AMATORE C, 1995, PHYSICAL ELECTROCHEM
  • [9] QUANTITATIVE-ANALYSIS OF REVERSIBLE DIFFUSION-CONTROLLED CURRENTS OF REDOX SOLUBLE SPECIES AT INTERDIGITATED ARRAY ELECTRODES UNDER STEADY-STATE CONDITIONS
    AOKI, K
    MORITA, M
    NIWA, O
    TABEI, H
    [J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1988, 256 (02): : 269 - 282
  • [10] BARD AJ, 1980, ELECTROCHEMICAL METH